triangle: Add new test case for scalene triangles to solve a bug [#2072] (#2075)
triangle: Add new test case for scalene triangles to solve a bug [#2072] (#2075)

* Add new test case for scalene triangles [#2072]

- Added new test case "two unadjacent sides are equal" of [3, 4, 3] for scalene triangles to solve a bug discussed in #2072
- New test case does not have a uuid yet
- The existing scalene triangle test case "two sides are equal" is changed to "two adjacent sides are equal" to distinguish it from the newly added test case

* Add uuid to new test case

* Change scalene triangles' test cases' name

* Add another scalene test case for redundancy

Added the test case "second and third sides are equal" to prevent other possible bugs.

* Correct mistake on "second and third sides are equal" test
jmluy/x-common,jmluy/x-common,jmluy/x-common